This standard specifies the relevant requirements for correctly selecting, installing, and using residual current operated protective devices (hereinafter referred as residual current protective device, RCD for short), and its operation and management. This standard is applicable to power supply and consumption system of power supply neutral-point direct grounding, the operating voltage is AC 50 Hz or 60 Hz, the rated voltage is less than or equal to 230/400 (220/ 380)V. This standard is not applicable to protection of phase-phase or phase-N line electric shock accident, electrical equipment damage, or electric fire accident.Note 2: In the connection mode figure of single-phase load or three-phase load in
different ground protection systems, the ... and right-side wiring diagrams in
single-phase and three-phase load wiring diagram are based on the field
situation, anbsp;...